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- /*
- * bs.c - original author: Bruce Holloway
- * salvo option by: Chuck A DeGaul
- * with improved user interface, autoconfiguration and code cleanup
- * by Eric S. Raymond
- */
-
- #include <stdio.h>
- #include <curses.h>
- #include <signal.h>
- #include <ctype.h>
- #include <assert.h>
-
- #ifndef A_UNDERLINE /* BSD curses */
- #define beep() write(1,"\007",1);
- #define saveterm savetty
- #define resetterm resetty
- #ifndef cbreak /* Sun curses.h has cbreak() */
- #define cbreak crmode
- #define nocbreak nocrmode
- #endif
- #define strchr index
- #define chtype char
- #define ungetch ungetc
- #else
- #define srand(n) srand48(n)
- #define rand() lrand48()
- extern long lrand48();
- extern void srand48();
- #define bzero(s, n) (void)memset((char *)(s), '\0', n)
- extern char *memset();
- #endif
-
- extern unsigned sleep();
- extern char *strchr(), *strcpy();
- extern long time();
- extern void exit();
-
- /*
- * Constants for tuning the random-fire algorithm. It prefers moves that
- * diagonal-stripe the board with a stripe separation of srchstep. If
- * no such preferred moves are found, srchstep is decremented.
- */
- #define BEGINSTEP 3 /* initial value of srchstep */
-
- /* miscellaneous constants */
- #define SHIPTYPES 5
- #define OTHER (1-turn)
- #define PLAYER 0
- #define COMPUTER 1
- #define FF '\014' /* used as redraw command */
- #define MARK_HIT 'H'
- #define MARK_MISS 'o'
-
- /* coordinate handling */
- #define BWIDTH 10
- #define BDEPTH 10
-
- /* display symbols */
- #define SHOWHIT '*'
- #define SHOWSPLASH ' '
- #define IS_SHIP(c) isupper(c)
-
- /* how to position us on player board */
- #define PYBASE 3
- #define PXBASE 3
- #define PY(y) (PYBASE + (y))
- #define PX(x) (PXBASE + (x)*3)
- #define pgoto(y, x) (void)move(PY(y), PX(x))
-
- /* how to position us on cpu board */
- #define CYBASE 3
- #define CXBASE 48
- #define CY(y) (CYBASE + (y))
- #define CX(x) (CXBASE + (x)*3)
- #define cgoto(y, x) (void)move(CY(y), CX(x))
-
- #define ONBOARD(x, y) (x >= 0 && x < BWIDTH && y >= 0 && y < BDEPTH)
-
- /* other board locations */
- #define COLWIDTH 80
- #define PROMPTLINE 21 /* prompt line */
- #define SYBASE CYBASE + BDEPTH + 3 /* move key diagram */
- #define SXBASE 63
- #define MYBASE SYBASE - 1 /* diagram caption */
- #define MXBASE 64
- #define HYBASE SYBASE - 1 /* help area */
- #define HXBASE 0
-
- /* this will need to be changed if BWIDTH changes */
- static char numbers[] = " 0 1 2 3 4 5 6 7 8 9";
-
- static char carrier[] = "Aircraft Carrier";
- static char battle[] = "Battleship";
- static char sub[] = "Submarine";
- static char destroy[] = "Destroyer";
- static char ptboat[] = "PT Boat";
-
- static char name[40];
- static char dftname[] = "Stranger";
-
- /* direction constants */
- #define E 0
- #define SE 1
- #define S 2
- #define SW 3
- #define W 4
- #define NW 5
- #define N 6
- #define NE 7
- static int xincr[8] = {1, 1, 0, -1, -1, -1, 0, 1};
- static int yincr[8] = {0, 1, 1, 1, 0, -1, -1, -1};
-
- /* current ship position and direction */
- static int curx = (BWIDTH / 2);
- static int cury = (BDEPTH / 2);
-
- typedef struct
- {
- char *name; /* name of the ship type */
- unsigned hits; /* how many times has this ship been hit? */
- char symbol; /* symbol for game purposes */
- char length; /* length of ship */
- char x, y; /* coordinates of ship start point */
- char dir; /* direction of `bow' */
- bool placed; /* has it been placed on the board? */
- }
- ship_t;
-
- ship_t plyship[SHIPTYPES] =
- {
- { carrier, 0, 'A', 5},
- { battle, 0, 'B', 4},
- { destroy, 0, 'D', 3},
- { sub, 0, 'S', 3},
- { ptboat, 0, 'P', 2},
- };
-
- ship_t cpuship[SHIPTYPES] =
- {
- { carrier, 0, 'A', 5},
- { battle, 0, 'B', 4},
- { destroy, 0, 'D', 3},
- { sub, 0, 'S', 3},
- { ptboat, 0, 'P', 2},
- };
-
- /* "Hits" board, and main board. */
- static char hits[2][BWIDTH][BDEPTH], board[2][BWIDTH][BDEPTH];
-
- static int turn; /* 0=player, 1=computer */
- static int plywon=0, cpuwon=0; /* How many games has each won? */
-
- static int salvo, blitz, closepack;
-
- #define PR (void)addstr
-
- static void uninitgame()
- /* end the game, either normally or due to signal */
- {
- clear();
- (void)refresh();
- (void)resetterm();
- (void)echo();
- (void)endwin();
- exit(0);
- }
-
- static void announceopts()
- /* announce which game options are enabled */
- {
- if (salvo || blitz || closepack)
- {
- (void) printw("Playing optional game (");
- if (salvo)
- (void) printw("salvo, ");
- else
- (void) printw("nosalvo, ");
- if (blitz)
- (void) printw("blitz ");
- else
- (void) printw("noblitz, ");
- if (closepack)
- (void) printw("closepack)");
- else
- (void) printw("noclosepack)");
- }
- else
- (void) printw(
- "Playing standard game (noblitz, nosalvo, noclosepack)");
- }
-
- static void intro()
- {
- extern char *getlogin();
- char *tmpname;
-
- srand(time(0L)+getpid()); /* Kick the random number generator */
-
- (void) signal(SIGINT,uninitgame);
- (void) signal(SIGINT,uninitgame);
- (void) signal(SIGIOT,uninitgame); /* for assert(3) */
- if(signal(SIGQUIT,SIG_IGN) != SIG_IGN)
- (void)signal(SIGQUIT,uninitgame);
-
- if(tmpname = getlogin())
- (void)strcpy(name,tmpname);
- else
- (void)strcpy(name,dftname);
- name[0] = toupper(name[0]);
-
- (void)initscr();
- (void)saveterm();
- (void)nonl();
- (void)cbreak();
- (void)noecho();
-
- #ifdef PENGUIN
- (void)clear();
- (void)mvaddstr(4,29,"Welcome to Battleship!");
- (void)move(8,0);
- PR(" \\\n");
- PR(" \\ \\ \\\n");
- PR(" \\ \\ \\ \\ \\_____________\n");
- PR(" \\ \\ \\_____________ \\ \\/ |\n");
- PR(" \\ \\/ \\ \\/ |\n");
- PR(" \\/ \\_____/ |__\n");
- PR(" ________________/ |\n");
- PR(" \\ S.S. Penguin |\n");
- PR(" \\ /\n");
- PR(" \\___________________________________________________/\n");
-
- (void) mvaddstr(22,27,"Hit any key to continue..."); (void)refresh();
- (void) getch();
- #endif /* PENGUIN */
-
- (void) clear();
- (void) mvaddstr(0,35,"BATTLESHIPS");
- (void) move(PROMPTLINE + 2, 0);
- announceopts();
-
- (void) mvaddstr(MYBASE, MXBASE, "Aiming keys:");
- (void) mvaddstr(SYBASE, SXBASE, "y k u 7 8 9");
- (void) mvaddstr(SYBASE+1, SXBASE, " \\|/ \\|/ ");
- (void) mvaddstr(SYBASE+2, SXBASE, "h-+-l 4-+-6");
- (void) mvaddstr(SYBASE+3, SXBASE, " /|\\ /|\\ ");
- (void) mvaddstr(SYBASE+4, SXBASE, "b j n 1 2 3");
- }
-
- /* VARARGS1 */
- static void prompt(n, f, s)
- /* print a message at the prompt line */
- int n;
- char *f, *s;
- {
- (void) move(PROMPTLINE + n, 0);
- (void) clrtoeol();
- (void) printw(f, s);
- (void) refresh();
- }
-
- static void error(s)
- char *s;
- {
- (void) move(PROMPTLINE + 2, 0);
- (void) clrtoeol();
- if (s)
- {
- (void) addstr(s);
- (void) beep();
- }
- }
-
- static void placeship(b, ss, vis)
- int b;
- ship_t *ss;
- int vis;
- {
- int l;
-
- for(l = 0; l < ss->length; ++l)
- {
- int newx = ss->x + l * xincr[ss->dir];
- int newy = ss->y + l * yincr[ss->dir];
-
- board[b][newx][newy] = ss->symbol;
- if (vis)
- {
- pgoto(newy, newx);
- (void) addch((chtype)ss->symbol);
- }
- }
- ss->hits = 0;
- }
-
- static void randomplace(b, ss)
- /* generate a valid random ship placement into px,py */
- int b;
- ship_t *ss;
- {
- register int bwidth = BWIDTH - ss->length;
- register int bdepth = BDEPTH - ss->length;
-
- do {
- ss->y = rnd(bdepth);
- ss->x = rnd(bwidth);
- ss->dir = rnd(2) ? E : S;
- } while
- (!checkplace(b, ss, FALSE));
- }
-
- static void initgame()
- {
- int i, unplaced;
- ship_t *ss;
-
- bzero(board, sizeof(char) * BWIDTH * BDEPTH * 2);
- bzero(hits, sizeof(char) * BWIDTH * BDEPTH * 2);
- for (i = 0; i < SHIPTYPES; i++)
- {
- ss = cpuship + i;
- ss->x = ss->y = ss->dir = ss->hits = ss->placed = 0;
- ss = plyship + i;
- ss->x = ss->y = ss->dir = ss->hits = ss->placed = 0;
- }
-
- /* draw empty boards */
- (void) mvaddstr(PYBASE - 2, PXBASE + 5, "Main Board");
- (void) mvaddstr(PYBASE - 1, PXBASE - 3,numbers);
- for(i=0; i < BDEPTH; ++i)
- (void) mvprintw(PYBASE + i, PXBASE - 3,
- "%c . . . . . . . . . . %c",i+'A',i+'A');
- (void) mvaddstr(PYBASE + BDEPTH, PXBASE - 3,numbers);
- (void) mvaddstr(CYBASE - 2, CXBASE + 7,"Hit/Miss Board");
- (void) mvaddstr(CYBASE - 1, CXBASE - 3, numbers);
- for(i=0; i < BDEPTH; ++i)
- (void) mvprintw(CYBASE + i, CXBASE - 3,
- "%c . . . . . . . . . . %c",i+'A',i+'A');
- (void) mvaddstr(CYBASE + BDEPTH,CXBASE - 3,numbers);
-
- (void) mvprintw(HYBASE, HXBASE,
- "To position your ships: move the cursor to a spot, then");
- (void) mvprintw(HYBASE+1,HXBASE,
- "type the first letter of a ship type to select it, then");
- (void) mvprintw(HYBASE+2,HXBASE,
- "type a direction ([hjkl] or [4862]), indicating how the");
- (void) mvprintw(HYBASE+3,HXBASE,
- "ship should be pointed. You may also type a ship letter");
- (void) mvprintw(HYBASE+4,HXBASE,
- "followed by `r' to position it randomly, or type `R' to");
- (void) mvprintw(HYBASE+5,HXBASE,
- "place all remaining ships randomly.");
-
- /* have the computer place ships */
- for(ss = cpuship; ss < cpuship + SHIPTYPES; ss++)
- {
- randomplace(COMPUTER, ss);
- placeship(COMPUTER, ss, FALSE);
- }
-
- ss = (ship_t *)NULL;
- do {
- extern char *strchr();
- char c, docked[SHIPTYPES + 2], *cp = docked;
-
- /* figure which ships still wait to be placed */
- *cp++ = 'R';
- for (i = 0; i < SHIPTYPES; i++)
- if (!plyship[i].placed)
- *cp++ = plyship[i].symbol;
- *cp = '\0';
-
- /* get a command letter */
- prompt(1, "Type one of [%s] to pick a ship.", docked+1);
- do {
- c = getcoord(PLAYER);
- } while
- (!strchr(docked, c));
-
- if (c == 'R')
- (void) ungetch('R');
- else
- {
- /* map that into the corresponding symbol */
- for (ss = plyship; ss < plyship + SHIPTYPES; ss++)
- if (ss->symbol == c)
- break;
-
- prompt(1, "Type one of [hjklrR] to place your %s.", ss->name);
- pgoto(cury, curx);
- }
-
- do {
- c = getch();
- } while
- (!strchr("hjklrR", c) || c == FF);
-
- if (c == FF)
- {
- (void)clearok(stdscr, TRUE);
- (void)refresh();
- }
- else if (c == 'r')
- {
- prompt(1, "Random-placing your %s", ss->name);
- randomplace(PLAYER, ss);
- placeship(PLAYER, ss, TRUE);
- error((char *)NULL);
- ss->placed = TRUE;
- }
- else if (c == 'R')
- {
- prompt(1, "Placing the rest of your fleet at random...");
- for (ss = plyship; ss < plyship + SHIPTYPES; ss++)
- if (!ss->placed)
- {
- randomplace(PLAYER, ss);
- placeship(PLAYER, ss, TRUE);
- ss->placed = TRUE;
- }
- error((char *)NULL);
- }
- else if (strchr("hjkl8462", c))
- {
- ss->x = curx;
- ss->y = cury;
-
- switch(c)
- {
- case 'k': case '8': ss->dir = N; break;
- case 'j': case '2': ss->dir = S; break;
- case 'h': case '4': ss->dir = W; break;
- case 'l': case '6': ss->dir = E; break;
- }
-
- if (checkplace(PLAYER, ss, TRUE))
- {
- placeship(PLAYER, ss, TRUE);
- error((char *)NULL);
- ss->placed = TRUE;
- }
- }
-
- for (unplaced = i = 0; i < SHIPTYPES; i++)
- unplaced += !plyship[i].placed;
- } while
- (unplaced);
-
- turn = rnd(2);
-
- (void) mvprintw(HYBASE, HXBASE,
- "To fire, move the cursor to your chosen aiming point ");
- (void) mvprintw(HYBASE+1, HXBASE,
- "and strike any key other than a motion key. ");
- (void) mvprintw(HYBASE+2, HXBASE,
- " ");
- (void) mvprintw(HYBASE+3, HXBASE,
- " ");
- (void) mvprintw(HYBASE+4, HXBASE,
- " ");
- (void) mvprintw(HYBASE+5, HXBASE,
- " ");
-
- (void) prompt(0, "Press any key to start...");
- (void) getch();
- }
-
- static int rnd(n)
- int n;
- {
- return(((rand() & 0x7FFF) % n));
- }
-
- static int getcoord(atcpu)
- int atcpu;
- {
- int ny, nx, c;
-
- if (atcpu)
- cgoto(cury,curx);
- else
- pgoto(cury, curx);
- (void)refresh();
- for (;;)
- {
- if (atcpu)
- {
- (void) mvprintw(CYBASE + BDEPTH+1, CXBASE+11, "(%d, %c)", curx, 'A'+cury);
- cgoto(cury, curx);
- }
- else
- {
- (void) mvprintw(PYBASE + BDEPTH+1, PXBASE+11, "(%d, %c)", curx, 'A'+cury);
- pgoto(cury, curx);
- }
- (void)refresh();
-
- switch(c = getch())
- {
- case 'k': case '8': ny = cury+BDEPTH-1; nx = curx; break;
- case 'j': case '2': ny = cury+1; nx = curx; break;
- case 'h': case '4': ny = cury; nx = curx+BWIDTH-1; break;
- case 'l': case '6': ny = cury; nx = curx+1; break;
- case 'y': case '7': ny = cury+BDEPTH-1; nx = curx+BWIDTH-1; break;
- case 'b': case '1': ny = cury+1; nx = curx+BWIDTH-1; break;
- case 'u': case '9': ny = cury+BDEPTH-1; nx = curx+1; break;
- case 'n': case '3': ny = cury+1; nx = curx+1; break;
- case '\014': (void)clearok(stdscr, TRUE); (void)refresh(); break;
- default:
- if (atcpu)
- (void) mvaddstr(CYBASE + BDEPTH + 1, CXBASE + 11, " ");
- else
- (void) mvaddstr(PYBASE + BDEPTH + 1, PXBASE + 11, " ");
- return(c);
- }
-
- curx = nx % BWIDTH;
- cury = ny % BDEPTH;
- }
- }
-
- static int collidecheck(b, y, x)
- /* is this location on the selected zboard adjacent to a ship? */
- int b;
- int y, x;
- {
- int collide;
-
- /* anything on the square */
- if (collide = IS_SHIP(board[b][x][y]))
- return(collide);
-
- /* anything on the neighbors */
- if (!closepack)
- {
- int i;
-
- for (i = 0; i < 8; i++)
- {
- int xend, yend;
-
- yend = y + yincr[i];
- xend = x + xincr[i];
- if (ONBOARD(xend, yend))
- collide += IS_SHIP(board[b][xend][yend]);
- }
- }
- return(collide);
- }
-
- static int checkplace(b, ss, vis)
- int b;
- ship_t *ss;
- int vis;
- {
- int l, xend, yend;
-
- /* first, check for board edges */
- xend = ss->x + ss->length * xincr[ss->dir];
- yend = ss->y + ss->length * yincr[ss->dir];
- if (!ONBOARD(xend, yend))
- {
- if(vis)
- switch(rnd(3))
- {
- case 0:
- error("Ship is hanging from the edge of the world");
- break;
- case 1:
- error("Try fitting it on the board");
- break;
- case 2:
- error("Figure I won't find it if you put it there?");
- break;
- }
- return(0);
- }
-
- for(l = 0; l < ss->length; ++l)
- {
- if(collidecheck(b, ss->y+l*yincr[ss->dir], ss->x+l*xincr[ss->dir]))
- {
- if (vis)
- switch(rnd(3))
- {
- case 0:
- error("There's already a ship there");
- break;
- case 1:
- error("Collision alert! Aaaaaagh!");
- break;
- case 2:
- error("Er, Admiral, what about the other ship?");
- break;
- }
- return(0);
- }
- }
- return(1);
- }
-
- static int awinna()
- {
- int i, j;
- ship_t *ss;
-
- for(i=0; i<2; ++i)
- {
- ss = (i) ? cpuship : plyship;
- for(j=0; j < SHIPTYPES; ++j, ++ss)
- if(ss->length > ss->hits)
- break;
- if (j == SHIPTYPES)
- return(OTHER);
- }
- return(-1);
- }
-
- static ship_t *hitship(x, y)
- /* register a hit on the targeted ship */
- int x, y;
- {
- ship_t *sb, *ss;
- char sym;
- int oldx, oldy;
-
- getyx(stdscr, oldy, oldx);
- sb = (turn) ? plyship : cpuship;
- if(!(sym = board[OTHER][x][y]))
- return((ship_t *)NULL);
- for(ss = sb; ss < sb + SHIPTYPES; ++ss)
- if(ss->symbol == sym)
- {
- if (++ss->hits < ss->length) /* still afloat? */
- return((ship_t *)NULL);
- else /* sunk! */
- {
- int i, j;
-
- if (!closepack)
- for (j = -1; j <= 1; j++)
- {
- int bx = ss->x + j * xincr[(ss->dir + 2) % 8];
- int by = ss->y + j * yincr[(ss->dir + 2) % 8];
-
- for (i = -1; i <= ss->length; ++i)
- {
- int x, y;
-
- x = bx + i * xincr[ss->dir];
- y = by + i * yincr[ss->dir];
- if (ONBOARD(x, y))
- {
- hits[turn][x][y] = MARK_MISS;
- if (turn % 2 == PLAYER)
- {
- cgoto(y, x);
- (void)addch(MARK_MISS);
- }
- }
- }
- }
-
- for (i = 0; i < ss->length; ++i)
- {
- int x = ss->x + i * xincr[ss->dir];
- int y = ss->y + i * yincr[ss->dir];
-
- hits[turn][x][y] = ss->symbol;
- if (turn % 2 == PLAYER)
- {
- cgoto(y, x);
- (void) addch(ss->symbol);
- }
- }
-
- (void) move(oldy, oldx);
- return(ss);
- }
- }
- (void) move(oldy, oldx);
- return((ship_t *)NULL);
- }
-
- static int plyturn()
- {
- ship_t *ss;
- bool hit;
- char *m;
-
- prompt(1, "Where do you want to shoot? ");
- for (;;)
- {
- (void) getcoord(COMPUTER);
- if (hits[PLAYER][curx][cury])
- {
- prompt(1, "You shelled this spot already! Try again.");
- beep();
- }
- else
- break;
- }
- hit = IS_SHIP(board[COMPUTER][curx][cury]);
- hits[PLAYER][curx][cury] = hit ? MARK_HIT : MARK_MISS;
- cgoto(cury, curx);
- (void) addch((chtype)hits[PLAYER][curx][cury]);
-
- prompt(1, "You %s.", hit ? "scored a hit" : "missed");
- if(hit && (ss = hitship(curx, cury)))
- {
- switch(rnd(5))
- {
- case 0:
- m = " You sank my %s!";
- break;
- case 1:
- m = " I have this sinking feeling about my %s....";
- break;
- case 2:
- m = " My %s has gone to Davy Jones's locker!";
- break;
- case 3:
- m = " Glub, glub -- my %s is headed for the bottom!";
- break;
- case 4:
- m = " You'll pick up survivors from my my %s, I hope...!";
- break;
- }
- (void)printw(m, ss->name);
- (void)beep();
- return(awinna() == -1);
- }
- return(hit);
- }
-
- static int sgetc(s)
- char *s;
- {
- char *s1;
- int ch;
-
- (void)refresh();
- for(;;)
- {
- ch = toupper(getch());
- if (ch == 3)
- uninitgame();
- for (s1=s; *s1 && ch != *s1; ++s1)
- continue;
- if (*s1)
- {
- (void) addch((chtype)ch);
- (void)refresh();
- return(ch);
- }
- }
- }
-
-
- static void randomfire(px, py)
- /* random-fire routine -- implements simple diagonal-striping strategy */
- int *px, *py;
- {
- static int turncount = 0;
- static int srchstep = BEGINSTEP;
- static int huntoffs; /* Offset on search strategy */
- int ypossible[BWIDTH * BDEPTH], xpossible[BWIDTH * BDEPTH], nposs;
- int ypreferred[BWIDTH * BDEPTH], xpreferred[BWIDTH * BDEPTH], npref;
- int x, y, i;
-
- if (turncount++ == 0)
- huntoffs = rnd(srchstep);
-
- /* first, list all possible moves */
- nposs = npref = 0;
- for (x = 0; x < BWIDTH; x++)
- for (y = 0; y < BDEPTH; y++)
- if (!hits[COMPUTER][x][y])
- {
- xpossible[nposs] = x;
- ypossible[nposs] = y;
- nposs++;
- if (((x+huntoffs) % srchstep) != (y % srchstep))
- {
- xpreferred[npref] = x;
- ypreferred[npref] = y;
- npref++;
- }
- }
-
- if (npref)
- {
- i = rnd(npref);
-
- *px = xpreferred[i];
- *py = ypreferred[i];
- }
- else if (nposs)
- {
- i = rnd(nposs);
-
- *px = xpossible[i];
- *py = ypossible[i];
-
- if (srchstep > 1)
- --srchstep;
- }
- else
- {
- error("No moves possible?? Help!");
- exit(1);
- /*NOTREACHED*/
- }
- }
-
- #define S_MISS 0
- #define S_HIT 1
- #define S_SUNK -1
-
- static bool cpufire(x, y)
- /* fire away at given location */
- int x, y;
- {
- bool hit, sunk;
- ship_t *ss;
-
- hits[COMPUTER][x][y] = (hit = (board[PLAYER][x][y])) ? MARK_HIT : MARK_MISS;
- (void) mvprintw(PROMPTLINE, 0,
- "I shoot at %c%d. I %s!", y + 'A', x, hit ? "hit" : "miss");
- if (sunk = (hit && (ss = hitship(x, y))))
- (void) printw(" I've sunk your %s", ss->name);
- (void)clrtoeol();
-
- pgoto(y, x);
- (void)addch((chtype)(hit ? SHOWHIT : SHOWSPLASH));
-
- return(hit ? (sunk ? S_SUNK : S_HIT) : S_MISS);
- }
-
- /*
- * This code implements a fairly irregular FSM, so please forgive the rampant
- * unstructuredness below. The five labels are states which need to be held
- * between computer turns.
- */
- static bool cputurn()
- {
- #define POSSIBLE(x, y) (ONBOARD(x, y) && !hits[COMPUTER][x][y])
- #define RANDOM_FIRE 0
- #define RANDOM_HIT 1
- #define HUNT_DIRECT 2
- #define FIRST_PASS 3
- #define REVERSE_JUMP 4
- #define SECOND_PASS 5
- static int next = RANDOM_FIRE;
- static bool used[4];
- static ship_t ts;
- int navail, x, y, d, n, hit = S_MISS;
-
- switch(next)
- {
- case RANDOM_FIRE: /* last shot was random and missed */
- refire:
- randomfire(&x, &y);
- if (!(hit = cpufire(x, y)))
- next = RANDOM_FIRE;
- else
- {
- ts.x = x; ts.y = y;
- ts.hits = 1;
- next = (hit == S_SUNK) ? RANDOM_FIRE : RANDOM_HIT;
- }
- break;
-
- case RANDOM_HIT: /* last shot was random and hit */
- used[E/2] = used[S/2] = used[W/2] = used[N/2] = FALSE;
- /* FALLTHROUGH */
-
- case HUNT_DIRECT: /* last shot hit, we're looking for ship's long axis */
- for (d = navail = 0; d < 4; d++)
- {
- x = ts.x + xincr[d*2]; y = ts.y + yincr[d*2];
- if (!used[d] && POSSIBLE(x, y))
- navail++;
- else
- used[d] = TRUE;
- }
- if (navail == 0) /* no valid places for shots adjacent... */
- goto refire; /* ...so we must random-fire */
- else
- {
- for (d = 0, n = rnd(navail) + 1; n; n--)
- while (used[d])
- d++;
-
- assert(d <= 4);
-
- used[d] = FALSE;
- x = ts.x + xincr[d*2];
- y = ts.y + yincr[d*2];
-
- assert(POSSIBLE(x, y));
-
- if (!(hit = cpufire(x, y)))
- next = HUNT_DIRECT;
- else
- {
- ts.x = x; ts.y = y; ts.dir = d*2; ts.hits++;
- next = (hit == S_SUNK) ? RANDOM_FIRE : FIRST_PASS;
- }
- }
- break;
-
- case FIRST_PASS: /* we have a start and a direction now */
- x = ts.x + xincr[ts.dir];
- y = ts.y + yincr[ts.dir];
- if (POSSIBLE(x, y) && (hit = cpufire(x, y)))
- {
- ts.x = x; ts.y = y; ts.hits++;
- next = (hit == S_SUNK) ? RANDOM_FIRE : FIRST_PASS;
- }
- else
- next = REVERSE_JUMP;
- break;
-
- case REVERSE_JUMP: /* nail down the ship's other end */
- d = ts.dir + 4;
- x = ts.x + ts.hits * xincr[d];
- y = ts.y + ts.hits * yincr[d];
- if (POSSIBLE(x, y) && (hit = cpufire(x, y)))
- {
- ts.x = x; ts.y = y; ts.dir = d; ts.hits++;
- next = (hit == S_SUNK) ? RANDOM_FIRE : SECOND_PASS;
- }
- else
- next = RANDOM_FIRE;
- break;
-
- case SECOND_PASS: /* kill squares not caught on first pass */
- x = ts.x + xincr[ts.dir];
- y = ts.y + yincr[ts.dir];
- if (POSSIBLE(x, y) && (hit = cpufire(x, y)))
- {
- ts.x = x; ts.y = y; ts.hits++;
- next = (hit == S_SUNK) ? RANDOM_FIRE: SECOND_PASS;
- break;
- }
- else
- next = RANDOM_FIRE;
- break;
- }
-
- /* check for continuation and/or winner */
- if (salvo)
- {
- (void)refresh();
- (void)sleep(1);
- }
- if (awinna() != -1)
- return(FALSE);
-
- #ifdef DEBUG
- (void) mvprintw(PROMPTLINE + 2, 0,
- "New state %d, x=%d, y=%d, d=%d",
- next, x, y, d);
- #endif /* DEBUG */
- return(hit);
- }
-
- playagain()
- {
- int j;
- ship_t *ss;
-
- for (ss = cpuship; ss < cpuship + SHIPTYPES; ss++)
- for(j = 0; j < ss->length; j++)
- {
- cgoto(ss->y + j * yincr[ss->dir], ss->x + j * xincr[ss->dir]);
- (void)addch((chtype)ss->symbol);
- }
-
- if(awinna())
- ++cpuwon;
- else
- ++plywon;
- j = 18 + strlen(name);
- if(plywon >= 10)
- ++j;
- if(cpuwon >= 10)
- ++j;
- (void) mvprintw(1,(COLWIDTH-j)/2,
- "%s: %d Computer: %d",name,plywon,cpuwon);
-
- prompt(2, (awinna()) ? "Want to be humiliated again, %s [yn]? "
- : "Going to give me a chance for revenge, %s [yn]? ",name);
- return(sgetc("YN") == 'Y');
- }
-
- static void do_options(c,op)
- int c;
- char *op[];
- {
- register int i;
-
- if (c > 1)
- {
- for (i=1; i<c; i++)
- {
- switch(op[i][0])
- {
- default:
- case '?':
- (void) fprintf(stderr, "Usage: battle [-s | -b] [-c]\n");
- (void) fprintf(stderr, "\tWhere the options are:\n");
- (void) fprintf(stderr, "\t-s : play a salvo game\n");
- (void) fprintf(stderr, "\t-b : play a blitz game\n");
- (void) fprintf(stderr, "\t-c : ships may be adjacent\n");
- exit(1);
- break;
- case '-':
- switch(op[i][1])
- {
- case 'b':
- blitz = 1;
- if (salvo == 1)
- {
- (void) fprintf(stderr,
- "Bad Arg: -b and -s are mutually exclusive\n");
- exit(1);
- }
- break;
- case 's':
- salvo = 1;
- if (blitz == 1)
- {
- (void) fprintf(stderr,
- "Bad Arg: -s and -b are mutually exclusive\n");
- exit(1);
- }
- break;
- case 'c':
- closepack = 1;
- break;
- default:
- (void) fprintf(stderr,
- "Bad arg: type \"%s ?\" for usage message\n", op[0]);
- exit(1);
- }
- }
- }
- }
- }
-
- static int scount(who)
- int who;
- {
- register int i, shots;
- register ship_t *sp;
-
- if (who)
- sp = cpuship; /* count cpu shots */
- else
- sp = plyship; /* count player shots */
-
- for (i=0, shots = 0; i < SHIPTYPES; i++, sp++)
- {
- if (sp->hits >= sp->length)
- continue; /* dead ship */
- else
- shots++;
- }
- return(shots);
- }
-
- main(argc, argv)
- int argc;
- char *argv[];
- {
- do_options(argc, argv);
-
- intro();
- do {
- initgame();
- while(awinna() == -1)
- {
- if (!blitz)
- {
- if (!salvo)
- {
- if(turn)
- (void) cputurn();
- else
- (void) plyturn();
- }
- else
- {
- register int i;
-
- i = scount(turn);
- while (i--)
- {
- if (turn)
- {
- if (cputurn() && awinna() != -1)
- i = 0;
- }
- else
- {
- if (plyturn() && awinna() != -1)
- i = 0;
- }
- }
- }
- }
- else
- while(turn ? cputurn() : plyturn())
- continue;
- turn = OTHER;
- }
- } while
- (playagain());
- uninitgame();
- /*NOTREACHED*/
- }
-
- /* bs.c ends here */
-